Finding the Third Proportional to 31,358 and 67,087

Step by Step Solution

1. Step 1: Write the proportion equation
   31,358 : 67,087 = 67,087 : x
2. Step 2: Convert to fraction form
   31,358/67,087 = 67,087/x
3. Step 3: Cross multiply
   31,358x = 67,087 × 67,087
4. Step 4: Simplify right side
   31,358x = 4,500,665,569
5. Step 5: Solve for x
   x = 4,500,665,569/31,358
6. Step 6: Final answer
   x = 143,525.27